I do think my ex-wife and I could've agreed to 50/50 parenting and gotten a judge to sign off on our agreement. But she would never have given up her legal/strategic advantage. Perhaps she was doing what she thought was best for the children. Perhaps. But I think she was more self-centered than that, she was doing what she wanted, regardless of the impact on the kids.
I have a deep appreciation for my ex-wife and her own personal struggles in the divorce. I do hope you find happiness. And as our last child exits your house, I hope you are able to enter a new chapter of your life, where I am not the bad guy.
Your kids are learning about life from how you behave, not how you tell them to behave. So behave honorably. Be respectful of your former partner. And love them with all of your heart when they are with you.